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List:       hadoop-user
Subject:    Re: map task in initializing phase for too long
From:       Doug Cutting <cutting () apache ! org>
Date:       2007-06-21 17:44:53
Message-ID: 467AB915.1010101 () apache ! org
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Raghu Angadi wrote:
> Doug Cutting wrote:
>> Owen wrote:
>>> One side note is that all of the servers have a servlet such that if  
>>> you do http://<node>:<port>/stacks you'll get a stack trace of all  
>>> the threads in the server. I find that useful for remote debugging.  
>>> *smile* Although if it is a task jvm that has the problem, then 
>>> there  isn't a server for them.
>>
>> (This should probably be added to the documentation or the wiki...)
> 
> We should. This is very useful. I have been working on Hadoop for months 
> but still didn't know.

A good place might be on:

http://wiki.apache.org/lucene-hadoop/HowToDebugMapReducePrograms

Doug

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